Interest Income and Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Interest Income and Other Expense Disclosure [Abstract]
Interest income	$ 205	$ 13	$ 43
Non-recoverable VAT tax	(506)	(494)	(323)
Foreign currency transaction (loss) gain	(1,467)	(665)	702
Miscellaneous income (expense)	47	(655)	(257)
Interest income and other (expense) income, net	$ (1,721)	$ (1,801)	$ 165